The Lippert Electric Trailer Brake Assembly replaces Lippert Assembly 12 Inch Diameter x 2 Inch Width. Specifications•Diameter: 12 Inch•Width: 2 Inch•Brake System: Electric•Brake Type: Drum•Axle Weight Capacity: 7000 Pound•Position: Left•Includes Backing Plate: Yes•Includes Brake Shoes: Yes•Includes Magnets: Yes•Includes Actuating Lever: Yes•Includes Adjusting Screw: Yes•Includes Spring Hardware: Yes•Estimated Install Time (Hours):0.5 Drum Brakes 4000-7000 Pound Axle Capacity With Backing Plate. Shoe & Lining Kit, Magnet Kit, Adjusting Screw, Spring Hardware | Lippert Electric Trailer Brake Assembly - 12" x 2", 5,200-7,000-lb. Axles, Left Side